from datetime import datetime, timedelta

from flask import render_template, request, jsonify, current_app, session, g, redirect, url_for
from sqlalchemy.sql.functions import now

from info import constants, db
from info.models import User, News, Category
from info.utils.image_storage import storage
from info.utils.response_code import RET
from . import admin_blue
from info.utils.common import user_login_data


@admin_blue.route('/login', methods=["GET", "POST"])
@user_login_data
def login():
    if request.method == "GET":
        return render_template('admin/login.html')
    
    username = request.form.get("username")
    password = request.form.get("password")
    
    if not all([username, password]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    
    try:
        user = User.query.filter(User.mobile == username).first()
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.PARAMERR, errmsg="数据查询失败")
    
    if not user:
        return render_template('admin/login.html', errmsg="用户不存在")
    
    if not user.check_password(password):
        return jsonify(errno=RET.PWDERR, errmsg="密码错误")
    
    if not user.is_admin:
        return render_template('admin/login.html', errmsg="用户权限错误")
    
    session["user_id"] = user.id
    session["nick_name"] = username
    session['mobile'] = user.mobile
    session['is_admin'] = True
    
    return redirect(url_for('admin.index'))


@admin_blue.route('/index')
@user_login_data
def index():
    user = g.user
    return render_template('admin/index.html', user=user.to_dict())


@admin_blue.route("/logout", methods=['POST'])
def logout():
    session.pop('user_id', None)
    session.pop('nick_name', None)
    session.pop('mobile', None)
    session.pop('is_admin', None)
    
    return jsonify(errno=RET.OK, errmsg="OK")


@admin_blue.route("/user_count")
def user_count():
    total_count = 0
    try:
        total_count = User.query.filter(User.is_admin == False).count()
    except Exception as e:
        current_app.logger.error(e)
    
    month_count = 0
    import time
    t = time.localtime()
    try:
        day_begin = '%d-%02d-%02d' % (t.tm_year, t.tm_mon, t.tm_mday)
        day_begin_date = datetime.strptime(day_begin, '%Y-%m-%d')
        month_count = User.query.filter(User.is_admin == False, User.create_time > day_begin_date).count()
    except Exception as e:
        current_app.logger.error(e)
    
    day_count = 0
    now_date = datetime.strptime(datetime.now().strftime('%Y-%m-%d'), '%Y-%m-%d')
    try:
        day_count = User.query.filter(User.create_time >= now_date).count()
    except Exception as e:
        current_app.logger.error(e)
    
    active_date = []
    active_count = []
    for i in range(0, 31):
        begin_date = now_date - timedelta(days=i)
        end_date = now_date - timedelta(days=(i - 1))
        active_date.append(begin_date.strftime('%Y-%m-%d'))
        count = 0
        
        try:
            count = User.query.filter(User.is_admin == False, User.last_login >= begin_date, User.last_login < end_date).count()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.DBERR, errmsg="数据查询失败")
        active_count.append(count)
    
    active_date.reverse()
    active_count.reverse()
    
    data = {
        "total_count": total_count,
        "mon_count": month_count,
        "day_count": day_count,
        "active_count": active_count,
        "active_date": active_date
    }
    return render_template('admin/user_count.html', data=data)


@admin_blue.route('/user_list')
def user_list():
    page = request.args.get("p", 1)
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1
    
    users = []
    total_page = 1
    current_page = 1
    try:
        paginate = User.query.filter(User.is_admin == False).order_by(User.last_login.desc()).paginate(page,
                                                                                                       constants.ADMIN_USER_PAGE_MAX_COUNT,
                                                                                                       False)
        users = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据库读取失败')
    
    user_list = []
    for user in users:
        user_list.append(user.to_admin_dict())
    
    data = {
        "users": user_list,
        "total_page": total_page,
        "current_page": current_page
    }
    
    return render_template("admin/user_list.html", data=data)


@admin_blue.route('/news_review')
def news_review():
    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", "")
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1
    
    news_list = []
    total_page = 1
    current_page = 1
    try:
        filters = [News.status != 0]
        if keywords:
            filters.append(News.title.contains(keywords))
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,
                                                                                         constants.ADMIN_NEWS_PAGE_MAX_COUNT,
                                                                                         False)
        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据库读取失败')
    
    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_review_dict())
    data = {
        "news_list": news_dict_li,
        "total_page": total_page,
        "current_page": current_page
    }
    return render_template("admin/news_review.html", data=data)


@admin_blue.route('/news_review_detail', methods=["GET", "POST"])
def news_review_detail():
    if request.method == "GET":
        news_id = request.args.get("news_id")
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.SERVERERR, errmsg="数据库查询失败")
        
        if not news:
            return render_template('admin/news_review_detail.html', data={"errmsg": "未查询到此新闻"})
        
        data = {
            "news": news
        }
        return render_template('admin/news_review_detail.html', data=data)
    
    action = request.json.get("action")
    news_id = request.json.get("news_id")
    
    if not all([action, news_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    
    if action not in ["accept", "reject"]:
        return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
    
    news = None
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg="数据读取错误")
    
    if not news:
        return jsonify(errno=RET.NODATA, errmsg="未查询到数据")
    
    if action == "accept":
        news.status = 0
    else:
        reason = request.json.get("reason")
        if not reason:
            return jsonify(errno=RET.PARAMERR, errmsg="参数错误")
        news.reason = reason
        news.status = -1
        
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="数据保存失败")
    return jsonify(errno=RET.OK, errmsg="操作成功")

@admin_blue.route('/news_edit')
def news_edit():
    page = request.args.get("p", 1)
    keywords = request.args.get("keywords", None)
    try:
        page = int(page)
    except Exception as e:
        current_app.logger.error(e)
        page = 1
    
    news_list = []
    total_page = 1
    current_page = 1
    try:
        filters = [News.status == 0]
        if keywords:
            filters.append(News.title.contains(keywords))
        paginate = News.query.filter(*filters).order_by(News.create_time.desc()).paginate(page,
                                                                                                       constants.ADMIN_NEWS_PAGE_MAX_COUNT,
                                                                                                       False)
        news_list = paginate.items
        current_page = paginate.page
        total_page = paginate.pages
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR, errmsg='数据库读取失败')
    
    news_dict_li = []
    for news in news_list:
        news_dict_li.append(news.to_dict())
    
    data = {
        "news_list": news_dict_li,
        "total_page": total_page,
        "current_page": current_page
    }
    
    return render_template("admin/news_edit.html", data=data)

@admin_blue.route('/news_edit_detail')
def news_edit_detail():
    if request.method == "GET":
        news_id = request.args.get("news_id")
        
        if not news_id:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})
        
    
        news = None
        try:
            news = News.query.get(news_id)
        except Exception as e:
            current_app.logger.error(e)
        
        if not news:
            return render_template('admin/news_edit_detail.html', data={"errmsg": "未查询到此新闻"})
    
        categories = Category.query.all()
        categories_li = []
        for category in categories:
            c_dict = category.to_dict()
            c_dict["is_selected"] = False
            if category.id == news.category_id:
                c_dict["is_selected"] = True
            categories_li.append(c_dict)
            
        categories_li.pop(0)
    
        data={
            "news":news,
            "categories": categories_li
        }
        return render_template('admin/news_edit_detail.html', data=data)
    
    news_id = request.form.get("news_id")
    title = request.form.get("title")
    digest = request.form.get("digest")
    content = request.form.get("content")
    index_image = request.files.get("index_image")
    category_id = request.form.get("category_id")

    if not all([title, digest, content, category_id]):
        return jsonify(errno=RET.PARAMERR, errmsg="参数有误")
    
    try:
        news = News.query.get(news_id)
    except Exception as e:
        current_app.logger.error(e)
        return jsonify(errno=RET.DBERR,errmsg="数据库读取失败")
        
    if not news:
        return jsonify(errno=RET.NODATA,errmsg="未查询到新闻数据")

    if index_image:
        try:
            index_image = index_image.read()
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.PARAMERR, errmsg="参数有误")
    
        try:
            key = storage(index_image)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(errno=RET.THIRDERR, errmsg="上传图片错误")
        news.index_image_url = constants.QINIU_DOMIN_PREFIX + key

    news.title = title
    news.digest = digest
    news.content = content
    news.category_id = category_id

    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")

    return jsonify(errno=RET.OK, errmsg="编辑成功")

@admin_blue.route('/news_type')
def news_type():

    categories = Category.query.all()

    categories_dicts = []

    for category in categories:
        cate_dict = category.to_dict()
        categories_dicts.append(cate_dict)

    categories_dicts.pop(0)
    return render_template('admin/news_type.html', data={"categories": categories_dicts})

@admin_blue.route("/add_category", methods=["POST"])
def add_category():
    category_name = request.json.get("name")
    category_id = request.json.get("id")
    
    if not category_name:
        return jsonify(errno=RET.PARAMERR,errmsg="参数错误")

    if category_id:
        try:
            category = Category.query.get(category_id)
        except Exception as e:
            current_app.logger.error(e)
            return jsonify(RET.DBERR,errmsg="数据库读取失败")

        if not category:
            return jsonify(errno=RET.NODATA, errmsg="未查询到分类信息")

        category.name = category_name
    else:
        category = Category()
        category.name = category_name
        db.session.add(category)
        
    try:
        db.session.commit()
    except Exception as e:
        current_app.logger.error(e)
        db.session.rollback()
        return jsonify(errno=RET.DBERR, errmsg="保存数据失败")
    return jsonify(errno=RET.OK, errmsg="保存数据成功")